Closed Cell Silicone Sponge Gaskets

CRG is a recognized leading producer of closed cell silicone sponge gaskets. These gaskets are used in a variety of applications, including sealing, vibration isolation and dampening, cushioning, and environmental. Our silicone sponge gaskets are fabricated from a variety of quality silicone sponge materials, using the most advanced manufacturing techniques.

Closed cell silicone sponge is often referred to as “expanded silicone.” The material is produced when uncured gum silicone is cured at high temperature and allowed to expand to a pre-determined thickness. The term “closed cell” is used because, as the gum silicone cures and expands, it produces a cellular structure within the material where the cells are completely enclosed and non-interconnecting. The resulting sponge is relatively impervious to the transmission of water or moisture through its structure, hence its use in applications where a waterproof seal is desired.

Closed cell silicone sponge is an interesting material. It possesses a high tensile and greater tear resistance, making it a more durable material that silicone foam. Closed cell silicone sponge is a flexible material, meaning it can readily adapt to variety of shapes and contours. It has non-stick properties and has good resistance to ozone and UV light. As noted above, the material presents a good barrier to the ingress of water or moisture when used as a seal.

About Closed Cell Silicone Sponge from CRG

Closed silicone sponges used by CRG to fashion gaskets and other products comes in a variety of thicknesses, density grades and formulations. Density grades available include soft, medium, firm, and extra-firm. Formulations we use offer the following advantages:

  • Wide temperature resistance. Closed cell silicone sponge has excellent resistance to extreme temperatures, able to withstand temperatures in excess of 230°C (446°F) and as low as -60°C (-76°F). This property makes closed cell silicone sponge an ideal material choice in applications that experience either extreme heat or cold.

  • Low compression set. Closed cell silicone sponge resists compression set and deformation under compressive load. This property makes it a preferred material for many sealing applications.

  • Food safe. Silicone is an inert polymer, meaning that it is essentially non-reactive. This property makes silicone a preferred material for applications in the food and beverage industry as the material exerts little to no effect on the products themselves. For this reason, some closed cell silicone sponges are FDA-approved for use in food-grade applications.

  • High resistance to ozone and UV. Unlike some other rubbers, silicone exhibits very good resistance to breakdown from ozone and Ultraviolet (UV) light. Thus, closed cell silicone sponge is an excellent material choice for outdoor applications where degradation from weathering and sunlight are a concern.

  • Water and moisture resistance. Since its cellular structure is self-contained and non-interconnected, closed cell silicone sponge offers good sealing against the ingress of water and moisture.

CRG Closed Cell Silicone Sponge Gaskets

CRG uses a variety of closed cell silicone sponges to fabricate silicone sponge gaskets and seals. These gaskets and seals are used in a wide array of uses in general industrial, food, pharmaceutical, medical devices, and automotive and mass transit applications. FDA-approved grades are available for food applications. All closed cell silicone sponge gaskets we produce are purpose-made for each customer’s application and all are produced to exacting dimensions and tolerances.

In addition to supplying gaskets, CRG can also produce a variety of other end-use parts from closed cell silicone sponge. Parts and products we can supply include the following:

  • Stripping and insulation. Stripping and insulation for industrial and automotive applications.

  • NVH products. Products for reducing noise, vibration and harshness (NVH) in industrial and automotive applications.

  • Miscellaneous die and CNC cut parts. Using our die or CNC cutting technologies, we can prototype and fabricate a variety of parts from closed cell silicone sponge.

  • Custom fabricated products. Our fabrication specialists can custom produce products from closed cell silicone sheet that will satisfy almost any application.

  • Silicone gasket tapes. We can slit and cut closed cell silicone gasket tapes, laminated with a pressure-sensitive adhesive (PSA) backing.

If you are requiring closed cell silicone sponge gaskets, or other parts fabricated from closed cell silicone sponge, CRG is your preferred supply partner.

To find out more about how we can help address your needs, please contact our sales department at